RE: [Trac] Open trac log files - too many open files apache error

[Voelker, Bernhard]

Georgios Koloventzos wrote (Thursday, July 05, 2012 5:20 PM):

> We have since some years a Trac installation, but recently we
> encountered a problem with the installation.
> We are using 0.11.7 version.
> We are hosting a large amount of trac instances (more than 1000).
>
> The problem is that the apache is opening the log file of every
> instance (environment) and it does not close them. This leads to
> reach the maximum open files limit.
> For resolving the error we have to restart apache every now and then.

You didn't tell any numbers and on what operating system you are
working with. Are you sure it's the trac.log? Did you check with
lsof? How many files are open? Doesn't raising the limit help?
E.g. doubling with
$ ulimit -n $(( $(ulimit -n) * 2 ))

Have a nice day,
Berny

[Georgios Koloventzos]

Hi Berny,

We are using red hat 5/6 with an apache 2.2.3 .

The trac.log files that are open are around 13000 per

backend. 

We have raised the limit but this will eventually come back when

more trac instances are created.

More over having some much open files loads apache and eventually is killed

bu the oom deamon.

Thanks,

Georgios

[Voelker, Bernhard]

Georgios Koloventzos wrote (Thursday, July 05, 2012 6:25 PM):

> On Thursday, July 5, 2012 6:13:04 PM UTC+2, berny wrote:
> > Georgios Koloventzos wrote (Thursday, July 05, 2012 5:20 PM):

> > > We have since some years a Trac installation, but recently we
> > > encountered a problem with the installation.
> > > We are using 0.11.7 version.
> > > We are hosting a large amount of trac instances (more than 1000).
> > >
> > > The problem is that the apache is opening the log file of every
> > > instance (environment) and it does not close them. This leads to
> > > reach the maximum open files limit.
> > > For resolving the error we have to restart apache every now and then.

> > You didn't tell any numbers and on what operating system you are
> > working with. Are you sure it's the trac.log? Did you check with
> > lsof? How many files are open? Doesn't raising the limit help?
> > E.g. doubling with
> > $ ulimit -n $(( $(ulimit -n) * 2 ))

> We are using red hat 5/6 with an apache 2.2.3 .
> The trac.log files that are open are around 13000 per
> backend. 
>
> We have raised the limit but this will eventually come back when
> more trac instances are created.
>
> More over having some much open files loads apache and eventually is killed
> bu the oom deamon.

Ouch, that sounds like a bug.
Did you try 0.12.x?

[Georgios Koloventzos]

Hi Berny,

We are trying to migrate and the one server we have

I think has the same problem.

When we migrate and we have a homogeneous cluster

I will post what is happening.

It is really weird for me that the files of logs are remaining open.

Even a little event creates a log for an instance this log will stay open ?!.

We have already thought to create a log file per server

in order to see if this will scale down. But with this

the grep will be our only ally when sth happens :D

 

Cheers,

Georgios

[Voelker, Bernhard]

Hi Georgios,

 

what about log_type= none or log_type=stderr?

 

http://trac.edgewall.org/wiki/TracIni#logging-section

 

Have a nice day,

Berny

 

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[Georgios Koloventzos]

Hi Berny,

We have it as log_type = warning

And yes maybe we should log only the 

errors but it is better to have some more logs

when sth happens.

Thanks,

Georgios

On Friday, July 6, 2012 11:27:54 AM UTC+2, berny wrote:

Hi Georgios,

 

what about log_type= none or log_type=stderr?

 

http://trac.edgewall.org/wiki/TracIni#logging-section

 

Have a nice day,

Berny

 

[Voelker, Bernhard]

Hi Georgios,

 

yes, that's okay. So maybe log_type=stderr could help.

I didn't try it but I guess the output is then written into apache's error_log

... which is already open and therefore doesn't need to be opened by TRAC again.

 

Have a nice day,

Berny

 

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[Georgios Koloventzos]

Hi Berny,

This sound as a solution and possible.

I will try and tell you.

Thank you very much,

Georgios

On Friday, July 6, 2012 12:54:48 PM UTC+2, berny wrote:

Hi Georgios,

 

yes, that's okay. So maybe log_type=stderr could help.

I didn't try it but I guess the output is then written into apache's error_log

... which is already open and therefore doesn't need to be opened by TRAC again.

 

Have a nice day,

Berny

 

 

Hi Berny,